CN203783739U - System for evaluating dynamic state of common rail fuel system - Google Patents
System for evaluating dynamic state of common rail fuel system Download PDFInfo
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- CN203783739U CN203783739U CN201290000647.9U CN201290000647U CN203783739U CN 203783739 U CN203783739 U CN 203783739U CN 201290000647 U CN201290000647 U CN 201290000647U CN 203783739 U CN203783739 U CN 203783739U
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- fuel
- electric current
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/3809—Common rail control systems
- F02D41/3836—Controlling the fuel pressure
- F02D41/3845—Controlling the fuel pressure by controlling the flow into the common rail, e.g. the amount of fuel pumped
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
- F02D41/2425—Particular ways of programming the data
- F02D41/2429—Methods of calibrating or learning
- F02D41/2451—Methods of calibrating or learning characterised by what is learned or calibrated
- F02D41/2464—Characteristics of actuators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0047—Layout or arrangement of systems for feeding fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
- F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
- F02D2041/2058—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit using information of the actual current value
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D2041/224—Diagnosis of the fuel system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D2041/224—Diagnosis of the fuel system
- F02D2041/225—Leakage detection
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/06—Fuel or fuel supply system parameters
- F02D2200/0602—Fuel pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/06—Fuel or fuel supply system parameters
- F02D2200/063—Lift of the valve needle
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The utility model provides a fuel controlling and dynamic state evaluating system which relates to fuel flow monitoring and control. According to one embodiment, a method for controlling the system with an engine comprises the steps that a predicted valve position of a valve is determined, the valve can be operated to be used for controlling the flow of fuel flowing to a fuel pump, and the fuel pump pumps fuel to a common fuel rail of the engine; the actual valve position is determined; the error between the predicated valve position and the actual valve position is determined; in response to the error, degradation conditions are set.
Description
Technical field
Theme disclosed in the utility model relates to for controlling the method and system of the common rail fuel system of vehicle.
Background technique
Vehicle (as rail vehicle) comprises power source (as diesel engine).In some vehicles, fuel is provided to diesel engine by common rail fuel system.The common rail fuel system of one type comprises the low-pressure fuel pump being communicated with high pressure fuel pump fluid, and the fuel rail that is communicated with described high pressure fuel pump fluid and is further communicated with at least one cylinder fluid.Described high pressure fuel pump is used for fuel pressurization to carry by described fuel rail.Fuel through described fuel rail at least one fuel injector, and at least one cylinder of Zhongdao, in described cylinder, fuel combustion provides power for vehicle.In order to reduce the possibility of motor degradation (degradation), can monitor the fuel leakage of described common rail fuel system.
In one approach, common rail fuel system by settling liquid sensor to detect fuel leakage in the outer wall of double walled ducting.If there is crack in the inwall of described double walled ducting, fuel will enter the cavity between described inwall and described outer wall by this crack so.Fuel is filled described cavity, until described liquid sensor detects it, now triggers the fault of indication fuel leakage.
Yet inventor of the present utility model has confirmed the problem of said method at this.For example, add described liquid sensor and detect cost of production and the design complexity that fuel leakage has increased described fuel system.As another example, above method only can detect the fuel leakage in described double walled ducting.If fuel leakage occurs in other places of described common rail fuel system, as occur in fuel injector nozzle or fuel injector control path, it may not can be detected by described liquid sensor so.
Model utility content
In one embodiment, a kind ofly for controlling the method for the system with motor, comprise: the prediction valve position of determining valve, described valve can be used to controls the fuel flow rate that flows to petrolift, and described petrolift is the common fuel track to described motor by fuel-pumping; Determine actual valve position; Determine the error between described prediction valve position and described actual valve position; And set degraded conditions in response to described error.Wherein setting degraded conditions comprises and closes described motor.
It is foundation that wherein said prediction valve position be take pre-side valve electric current, and actual valve electric current be take as foundation in described actual valve position.
The function of inlet's fuel pressure that wherein said pre-side valve electric current is described valve, the fuel quantity being sprayed by the single-fuel sparger stroke that is connected to the fuel injector of described common fuel track, engine speed and effective cylinder number.
The function of inlet's fuel pressure that wherein said pre-side valve electric current is described valve, the horsepower of described motor, engine speed and effective cylinder number.
Wherein said degraded conditions is in response to described error and is greater than error threshold and sets.
Wherein, along with described pre-side valve electric current increases, described error threshold increases with respect to desirable error.
Wherein said error threshold is non-linear zoom with respect to described desirable error.
Wherein for the first area of described pre-side valve electric current, described error threshold is the first value, for described pre-side valve electric current, be greater than the second area of the described pre-side valve electric current of described first area, described error threshold is the second value that is greater than described the first value, and for the 3rd region between described first area and described second area of described pre-side valve electric current, described error threshold is the ramp function between described the first value and described the second value.
The utility model also discloses a kind of system, and it comprises: low-pressure fuel pump, and it can be used under the first pressure from fuel source pump fuel; High pressure fuel pump, it can be used to described the first pressure is increased to the second pressure; Valve, it is arranged between described low-pressure fuel pump and described high pressure fuel pump, and described valve can be used to controls the fuel flow rate that flows to described high pressure fuel pump; Common fuel track, it is connected to a plurality of fuel injectors by described high pressure fuel pump fluid, and described a plurality of fuel injectors can be used to the cylinder that injects fuel into motor; And controller, its can be used to determine described valve prediction valve position, determine described valve actual valve position, calculate error between described prediction valve position and described actual valve position and in response to described error setting degraded conditions.
Wherein said controller can be used in response to the described degraded conditions of setting and closes described motor.
The function of the fuel quantity that inlet's fuel pressure that wherein said prediction valve position is described valve, the single-fuel sparger stroke of in described a plurality of fuel injectors spray, engine speed and effective cylinder number.
Wherein said degraded conditions is in response to described error and is greater than error threshold and sets.
It is foundation that wherein said prediction valve position be take pre-side valve electric current, and actual valve electric current be take as foundation in described actual valve position.
Wherein for the first area of described pre-side valve electric current, described error threshold is the first value, for described pre-side valve electric current, be greater than the second area of the described pre-side valve electric current of described first area, described error threshold is the second value that is greater than described the first value, and for the 3rd region between described first area and described second area of described pre-side valve electric current, described error threshold is the ramp function between described the first value and described the second value.
The utility model also discloses a kind of system, and it comprises: low-pressure fuel pump, and it can be used under the first pressure from fuel source pump fuel; High pressure fuel pump, it can be used to described the first pressure is increased to the second pressure; Valve, it is arranged between described low-pressure fuel pump and described high pressure fuel pump, and described valve can be used to controls the fuel flow rate that flows to described high pressure fuel pump; Common fuel track, it is connected to a plurality of fuel injectors by described high pressure fuel pump fluid, and described a plurality of fuel injectors can be used to the cylinder that injects fuel into motor; And controller, it can be used to: determine the pre-side valve electric current of described valve, described pre-side valve electric current is the fuel pressure of described valve inlet, fuel quantity that the single-fuel sparger stroke of in described a plurality of fuel injectors sprays, engine speed and the effective function of cylinder number; Determine the actual valve electric current of described valve; Determine the error between described pre-side valve electric current and described actual valve electric current; And in response to being greater than error threshold values, described error closes described motor.
Wherein, in the scope of described pre-side valve electric current, described error threshold changes in proportion with respect to desirable error.
Wherein, along with described pre-side valve electric current increases, described error threshold increases with respect to described desirable error.
Wherein said error threshold is non-linear zoom with respect to described desirable error.
Wherein for the first area of described pre-side valve electric current, described error threshold is the first value, for described pre-side valve electric current, be greater than the second area of the described pre-side valve electric current of described first area, described error threshold is the second value that is greater than described the first value, and for the 3rd region between described first area and described second area of described pre-side valve electric current, described error threshold is the ramp function between described the first value and described the second value.
Wherein said common fuel track is single wall common fuel track.
The utility model also discloses a kind of non-provisional electronically readable medium, and it has one or more groups instruction stored thereon, when electronic equipment is accessed and carried out described instruction, causes that described electronic equipment carries out:
At least one item in the following: the information of the prediction valve position of receiving valve; Or calculate described prediction valve position, and described valve can be used to controls the fuel flow rate that flows to petrolift, and described petrolift is configured for the common fuel track to motor by fuel-pumping;
At least one item in the following: the information that receives the actual valve position of described valve; Or definite described actual valve position;
Calculate the error between described prediction valve position and described actual valve position; And
In response to described error, generate the one or more signals relevant with setting degraded conditions.
In an example, described prediction inlet metering valve position is derived from the electric current of described inlet metering valve.Described inlet metering valve electric current can the stable state fuel flow rate balance from common rail fuel system be derived, and described stable state fuel flow rate balance is associated the fuel flow rate flowing into flowing out described common rail fuel system.Inconsistent (disparity) of predicted current and actual current shows may have missing (unaccounted) fuel flow rate in flow equilibrium model, as due to leakage.For example, or inconsistent between predicted current and actual current can show that parts break down (, excessive wear appears in high pressure fuel pump (HPP)).By predict the operation of described common rail fuel system with described inlet metering valve electric current, can be in the situation that be connected to the special sensor in double-walled fuel circuit or therewith detect fuel leakage from obtainable power operation data.In addition, thus this method can more easily be adapted to different motors and be adapted to different fuel system.
It is in order to introduce in simplified form the selected concept being described further in the utility model that the utility model content is provided.The utility model content is not intended to confirm key feature or the essential characteristic of theme required for protection, is also not intended to for limiting the scope of theme required for protection.In addition, theme required for protection is not limited to solve the mode of execution of any or all shortcoming of pointing out in the utility model any part.In addition, the inventor has realized that the problem of any confirmation and corresponding solution at this.
Accompanying drawing explanation
With reference to accompanying drawing, reading following indefiniteness embodiment's description can understand the utility model better, wherein:
The example embodiment of the schematically illustrated common rail fuel system of the present utility model of Fig. 1.
The example of the flow equilibrium figure of the common rail fuel system of the schematically illustrated Fig. 1 of Fig. 2.
Fig. 3 illustrates the regression curve for the predicted operation of the common rail fuel system of Fig. 1.
Fig. 4 illustrates the plotted curve of the scalable error threshold changing with respect to inlet metering valve electric current.
Fig. 5 is for controlling embodiment's the flow chart of the fuel leakage detecting method of common rail fuel system.
Fig. 6 is for controlling the embodiment's who safeguards diagnostic method of common rail fuel system flow chart.
Embodiment
The utility model relates to the vehicle (as rail vehicle) that comprises motor (as diesel engine), and wherein fuel is by common rail fuel system (Common Rail Fuel System; Abbreviation CRS) be provided to described motor.Described CRS comprises common fuel track, and described common fuel track provides fuel to for injecting fuel into a plurality of fuel injectors of the cylinder of described motor.In an example, described CRS comprises inlet metering valve (Inlet Metering Valve; Be called for short IMV), described inlet metering valve is positioned between low-pressure fuel pump and high pressure fuel pump.Described IMV can be used to and controls the fuel flow rate flowing to as the described high pressure fuel pump of described common fuel track feed fuels.Described IMV can be through adjusting the fuel quantity that changes be provided to common fuel track along with operational state change.More particularly, the utility model relates to the situation (health) of CRS described in dynamic evaluation.
For example, can to the situation of described CRS, carry out dynamic evaluation by the whole bag of tricks of the fuel leakage for detection of in described CRS.An embodiment of CRS shown in Fig. 1.
The steady state flow phase diagram of the CRS of presentation graphs shown in Fig. 21.Described flow equilibrium figure represents functional mode, and described functional mode has illustrated different operating parameter to described CRS and flowed in described system and the impact of flowing out the fuel flow rate of described system.Described flow equilibrium can be for confirming inconsistent between the parameter value in described CRS together with described IMV electric current.In an example, the flow equilibrium function going out from described flow equilibrium model inference provides the predicted current of described IMV, and described predicted current represents to produce with based on the electric current of inlet metering valve position is provided by various sensor measurements or definite current operation status.Then described predicted current and the actual IMV electric current of indication actual valve position can be compared, to detect whether to exist, leak or the parts of described CRS whether demote (degraded).
The exemplary recurrence (regression) of the flow equilibrium function based on Fig. 2 shown in Fig. 3.Exemplary error threshold shown in Fig. 4 between described prediction IMV electric current and described actual IMV electric current.The exemplary method of a kind of CRS for control graph 1 shown in Fig. 5, this control is based on adopting described flow equilibrium function to obtain described prediction IMV electric current to detect fuel leakage.Carrying out the method shown in Fig. 5 monitors continuously relatively large (for example thick (gross)) in described CRS during power operation and leaks (comparing with relatively little leakage).
The exemplary method of a kind of CRS for control graph 1 shown in Fig. 6, this control is that speed based on monitoring fuel pressure decay is to confirm relatively little leakage (with comparing by the described relatively large leakage that Fig. 5 was monitored).Specifically, described method by the described motor no-load condition of monitoring during the rail pressure rate of decay of (as when ato unit start event (cranking event)) check as described in the integrity of CRS.Specifically, during engine start, motor to initiate engine running before transfer the fuel described in electric motor starting.During this state, described motor is driven by described motor and is unloaded (unloaded).In addition, starting state can be during confirm by the maintenance of carrying out during off-mode, to be caused the advantageous particularly state of relatively little leakage often because this class is leaked.
Fig. 1 comprises the skeleton diagram for the CRS100 of the motor of vehicle (as rail vehicle).In an example, described rail vehicle is locomotive.In alternate embodiment, described motor can be off highway vehicle, stationary power generation factory, boats and ships or the another kind of type in other.Liquid fuel is from fuel tank 102 or be stored in fuel tank 102.Low-pressure fuel pump 104 is communicated with in fluid with fuel tank 102.In this embodiment, low-pressure fuel pump 104 is arranged on the inside of fuel tank 102, and can immerse below liquid fuel liquid level.In alternate embodiment, described low-pressure fuel pump can be connected to the outside of described fuel tank and carry out pump fuel by aspirator.The operation of low-pressure fuel pump 104 is regulated by controller 106.
Liquid fuel is pumped into high pressure fuel pump 108 by conduit 110 from fuel tank 102 by low-pressure fuel pump 104.Valve 112 is arranged in conduit 110 and regulates by the fuel flow rate of conduit 110.For example, valve 112 is inlet metering valves.IMV112 is arranged on the upstream of high pressure fuel pump 108, to adjust, is provided to high pressure fuel pump 108 and is further provided to common fuel track 114 for being assigned to the flow velocity of the fuel of a plurality of fuel injectors 118 that spray for fuel.For example, IMV112 can be solenoid valve, and its opening and closing are regulated by controller 106.In other words, the described IMV of controller 106 order closes completely, opens completely or the position between closing completely and opening completely, to the fuel flow rate that flows to high pressure fuel pump 108 is controlled, is ordered fuel flow rate.In the operation period of vehicle, IMV112 is used for carrying out metering fuel based on serviceability through adjusting, and can open at least partly during at least some states.Should be understood that, described valve be only used for metering fuel control gear an example and in the situation that not departing from the utility model scope, can adopt any suitable control unit.For example, the position of described IMV or state can carry out electric control by controlling IMV electric current.As another example, the actuating motor that the position of described IMV or state can be used for adjusting described IMV by control carries out machinery and controls.
High pressure fuel pump 108 is increased to elevated pressures by fuel pressure from lower pressure.High pressure fuel pump 108 is connected in fluid with common fuel track 114.High pressure fuel pump 108 arrives common fuel track 114 by conduit 116 transfer the fuels.A plurality of fuel injectors 118 are communicated with in fluid with common fuel track 114.Each transfer the fuel in a plurality of fuel injectors 118 is to one in a plurality of cylinders 120 in motor 122.For example, the fuel combustion in a plurality of cylinders 120 provides power by alternator and traction electric machine for described vehicle.The operation of a plurality of fuel injectors 118 is regulated by controller 106.In the embodiment in figure 1, motor 122 comprises four fuel injectors and four cylinders.In alternate embodiment, in described motor, can comprise more or less fuel injector and cylinder.
In some embodiments, described common fuel track is single wall fuel rail.Described CRS can also comprise single wall conduit (if conduit 116 can be single wall) for delivery of fuel to as described in fuel rail.With respect to double-walled configuration, can adopt single wall to configure to reduce production costs and alleviate the weight of described CRS.
The fuel that is pumped into IMV112 import from fuel tank 102 by low-pressure fuel pump 104 can operate under the pressure that is called as lower fuel pressure or motor fuel pressure.Correspondingly, the parts that are arranged in high pressure fuel pump 108 upstreams of CRS100 operate in lower fuel pressure or motor fuel pressure span.On the other hand, high pressure fuel pump 108 can be pumped into higher fuel pressure or track fuel pressure from described compared with low fuel pressure by fuel.Correspondingly, the parts that are arranged in high pressure fuel pump 108 downstreams of CRS100 operate in higher fuel pressure or the track fuel pressure region of CRS100.
Describedly compared with the fuel pressure in low fuel pressure region, by the pressure transducer 126 being positioned in conduit 110, measured.Pressure transducer 126 sends pressure signal to controller 106.In an alternate application, pressure transducer 126 is communicated with in fluid with the outlet of low-pressure fuel pump 104.Describedly compared with the fuel temperature in low fuel pressure region, by the temperature transducer 128 being positioned in conduit 110, measured.Temperature transducer 128 sends temperature signal to controller 106.
Fuel pressure in described higher fuel pressure region is measured by the pressure transducer 130 being positioned in conduit 116.Pressure transducer 130 sends pressure signal to controller 106.In an alternate application, pressure transducer 130 is communicated with in fluid with the outlet of high pressure fuel pump 108.Note that in some applications, except direct measurement or in contrast, various operating parameters generally can indirectly be determined or derive.
Except the sensor mentioned above, controller 106 receives various signals from being connected to a plurality of engine sensors 134 of motor 122, and these signals can be for the assessment of fuel control status and correlation engine operation.For example, controller 106 receives the sensor signal of the number of cylinders etc. of indication air fuel ratios, engine speed, engine loading, engine temperature, ambient temperature, fuel value, active combustion fuel.In illustrated mode of execution, controller 106 is computing devices, as comprises the microcomputer of processor unit 136, non-provisional computer-readable recording medium device 138, input/output end port, storage and data/address bus.The computer-readable recording medium 138 being included in controller 106 can be programmed by the mechanized data of the instruction that represents to be carried out by described processor, and described instruction is for implementing the variant that control routine described below and method and other are not specifically listed.
Controller 106 can be used to the different operating parameter that unlike signal based on from receiving from described various sensors receives or derive and adjusts the various actuators CRS100, dynamically to assess the situation of described CRS and to control the operation of described motor based on described assessment.For example, in an embodiment, controller 106 can be used to and carries out situation inspection diagnosis, and described situation inspection diagnosis is carried out continuously for protecting during operation described motor.Described situation inspection diagnosis utilizes the operative knowledge of described IMV to detect thick fuel leakage or other degradations.Specifically, it should be understood that the device that described IMV normally opens during power operation.Therefore, can suppose, if described actual IMV position (or electric current of indicating positions) is different from prediction IMV position (or electric current of indicating positions), excess of fuel flow is just being provided to described common fuel track so.In addition, suppose that fuel pressure in described high-pressure service pump downstream and described common fuel track for example, through being adjusted to desirable pressure (constant), can suppose so, except passing through ordered fuel injection, excess of fuel flow is flowing out described common fuel track.This excess of fuel flow also may represent leakage in described CRS or other degradations of described CRS, as over worn high pressure fuel pump.
Controller 106 can be used to by determining that prediction IMV position based on prediction IMV electric current carries out described continuous situation inspection and diagnose.Described prediction IMV electric current is derived from flow equilibrium function, below with reference to Fig. 2, further discusses described flow equilibrium function in detail.In addition, controller 106 can be used to the actual IMV position of determining based on actual IMV electric current.For example, described actual IMV electric current is provided to IMV112 for control valve position by controller 106.Controller 106 can be used to the error of determining between described prediction IMV electric current and described actual IMV electric current.If described error is greater than error threshold, controller 106 can be used to setting degraded conditions so.Described error threshold can be set as any suitable value, and can calibrate to adapt to different CRS configurations.In certain embodiments, described in convergent-divergent, error threshold changes along with described IMV curent change.Below with reference to Fig. 4, further discuss the convergent-divergent of described error threshold in detail.
In some embodiments, described degraded conditions can comprise and kills engine 122.By closing described motor in response to fuel leakage being detected, can reduce the possibility of motor degradation, operability degradation or analogue.In some embodiments, described degraded conditions can comprise and sets diagnostic markers and the indication of described degraded conditions (for example video or audio frequency) is presented to operator.
As another example of the dynamic situation assessment of described CRS, controller 106 can be used to after the maintenance period of described CRS, check described CRS integrity to determine whether to exist fuel leakage.This assessment inspection is the most possible less leakage occurring after inappropriate maintenance, makes like this them before becoming larger fuel leakage, to be resolved.The less fuel leakage of condition evaluation inspection after safeguarding, the thick fuel leakage of continuous review is diagnosed in above-mentioned condition inspection.Specifically, with regard to the former, controller 106 can operate during the no-load condition of described motor, to stop the fuel of a plurality of fuel injectors 118, sprays and closes IMV112.The no-load condition of motor comes across when described motor rotates by inertia or from the external torque of described external engine generation.As an example, during engine start when actuating motor rotates described motor, there is no-load condition.Described in the engine-driving of rotating, petrolift pressurizes to described common fuel track.As another example, when motor/generator provides power for described motor, there is no-load condition.As another example, when described motor absorbs torque or produce negative or retarding torque, as during sliding (Coast down) event, there is no-load condition.Coasting events comes across following time: the positive high speed operation of motor, desired engine loading vanishing (or non-loaded), and described motor rotates by inertia, until slowing to engine speed, external drag specifies in rotating speed or the increase of desired engine loading.In other words, the no-load condition of motor is to there is no need to carry out the state that fuel sprays to meet engine loading.It is to carry out during the no-load condition of described motor that described maintenance is assessed afterwards, makes like this in the situation that not disturbing power operation, to stop fuel and sprays.
Once fuel injection stops and described IMV closes, controller 106 specifies the endurance to monitor the fuel pressure decay in common fuel track 114 with regard to continuing first.Can specify or select described the first endurance based on serviceability, and it can be predetermined lasting time.If after described first specifies the endurance, in described common fuel track, the fuel rail decline of pressure speed of fuel pressure is greater than rate of decay threshold value, controller 106 can be used to setting degraded conditions so.If described fuel rail decline of pressure speed is less than described rate of decay threshold value, fuel is sprayed and restart and power operation continuation so.Fuel pressure decay refers to decline in time of fuel pressure or reduces.Fuel pressure decay is monitored during state of a control mentioned above (injection stops and described IMV closes), because under this class state, fuel should neither can leave in a large number also and can not enter in a large number common fuel track 114.Therefore the fuel pressure rate of decay that, is greater than described rate of decay threshold value has been indicated possible leakage situation.
In some embodiments, controller 106 can be used to by be greater than current threshold in response to described IMV electric current and starts described first and specify the endurance, initiate for measure common fuel track 114 described fuel pressure rate of decay described first verify closing of described IMV before specifying the endurance.In other words, before initiating the monitoring of described fuel pressure decay, controller 106 is waited for the current threshold that described accumulation of electrical current is closed completely to the described valve of indication.
In some embodiments, as above, described degraded conditions can comprise and kills engine 122.By closing described motor in response to fuel leakage being detected, can reduce the possibility of motor degradation, operability degradation or analogue.In some embodiments, described degraded conditions can comprise and sets diagnostic markers and the indication of described degraded conditions (for example video or audio frequency) is presented to operator.
In some embodiments, controller 106 can be used to before monitoring fuel pressure decays to determine possible fuel leakage, checked that whether serviceability is suitable.For example, controller 106 can be used to and checks that low-pressure fuel pump 104 is to common fuel track 114 pump fuel, makes to exist enough fuel pressure accumulation determine or measure fuel pressure and decay.Correspondingly, controller 106 can be used to and checks that motor 122 is just operating in described motor and starting to operate within the scope of the given engine speed of described petrolift.By checking whether this class state comes into force, can reduce the possibility of the false positive assessment of fuel leakage in described CRS.In addition, controller 106 can be used to and in following situation, sets degraded conditions: for example, if (work as this class state validate, the described motor fuel pressure of described IMV inlet is greater than motor fuel pressure threshold and engine speed within the scope of given engine speed) time, described fuel rail pressure continues second and specifies the endurance to be less than the words of track fuel pressure threshold.Described second specify the endurance can with for monitoring described first of fuel pressure decay, specify the endurance identical or different.In an example, first to specify the endurance be that within 0.2 second and second, to specify the endurance be 30 seconds.In other words, if motor 122 starts and low-pressure fuel pump 104 just in pump fuel, but described fuel pressure does not also have accumulation to surpass described fuel pressure threshold after described second specifies the endurance, there is the degradation of components of fuel leakage or described CRS in supposition so just.
In some embodiments, non-provisional electronically readable medium 138 has one or more groups instruction stored thereon, for example, when accessing and carry out described one or more groups instruction, electronic equipment (processor unit 136) causes described electronic equipment: during the no-load condition at motor, generate one or more first signals, for controlling the fuel of a plurality of fuel injectors 118 that stop motor 122, spray; Generate one or more secondary signals, for controlling to close, can be used to the valve 112 of controlling the fuel flow rate that flows to petrolift 108.Petrolift 108 is connected with the common fuel track 114 of motor 122, for providing fuel to common fuel track 114.In addition, when accessing and carrying out by described electronic equipment, described instruction causes described electronic equipment: in response to the fuel pressure rate of decay in common fuel track 114 after described first specifies the endurance, be greater than decay threshold value, generate one or more the 3rd signals, for controlling the operation of described motor.For example, described one or more the 3rd signal causes in response to the fuel pressure rate of decay in described common fuel track is greater than described rate of decay threshold value and kills engine 122.
An example of flow equilibrium Figure 200 of the CRS100 of the schematically illustrated Fig. 1 of Fig. 2.Flow equilibrium Figure 200 application quality conservation is analyzed the fuel flow rate that flows into and flow out CRS100.Specifically, by calculating, enter and leave the fuel of described CRS, can confirm the inconsistent of fuel flow rate, and this otherwise may be difficult to Measurement accuracy.
The fuel quantity that lower pressure (LP) region of the fuel flow rate input of flow equilibrium Figure 200 based on from CRS100 provides is determined.Specifically, the input of described fuel flow rate is the operation based on by low-pressure fuel pump 104 and the fuel temperature (FT) of fuel in the motor fuel pressure (EFP) that provides and described lower pressure region.Described motor fuel pressure and described fuel temperature are for determining the described fuel flow rate input of flow equilibrium Figure 200.Described motor fuel pressure is provided to controller 106 by pressure transducer 126.Described fuel temperature is provided to controller 106 by temperature transducer 128.On the other hand, the output of the fuel flow rate of flow equilibrium Figure 200 is the fuel injection quantity based on being sprayed by effective fuel injector.For example, described fuel injection quantity can be from being sprayed and determined by ordered fuel by pulse width modulating signal.Note that effective fuel injector for example refers to, during cycle of engine (its can be, 2 or 4 strokes) the wherein fuel injector of burner oil for burning at cylinder.
Flow equilibrium Figure 200 comprises that impact flows into and flow out the parts of the fuel flow rate balance of CRS100.Flow equilibrium Figure 200 comprises IMV112, high pressure fuel pump (HPP) 108, common fuel track (CFR) 114 and a plurality of fuel injector (INJ) 118.The different operating parameter indicated serviceability of each in these parts based on by specific to these parts and fuel flow rate balance is had to Different Effects.
For example, the serviceability of IMV112 is indicated by IMV electric current.Described IMV electric current offers IMV112 by controller 106 by guide line, to control the position of described IMV.As an example, higher IMV electric current represents that IMV position more closes (maximum IMV electric current represents complete closed position), and lower IMV electric current represents that IMV position more opens (zero or minimum IMV electric current represent fully open position).Described IMV electric current can be for determining the amount of the fuel flow rate of the high pressure fuel pump that is provided to 108 in conjunction with described input fuel flow rate.
The serviceability of high pressure fuel pump 108 for example, is determined from engine speed (, rpm (RPM)) and fuel value (FV).In a plurality of engine sensors 134 one of described engine speed is provided to controller 106.At high pressure fuel pump 108, be in engine-driven mode of execution, the operation of petrolift increases along with the increase of engine speed.Described fuel value is the fuel quantity by high pressure fuel pump 108 institute's pumping in each pump stroke.Engine speed and fuel value determine the speed of the fuel flow rate of common fuel track 114 that is provided to.
The rail pressure (RP) of the serviceability of common fuel track 114 fuel in the volume of described common fuel track or fuel capacity and described common fuel track is indicated.Described rail pressure is provided to described controller by pressure transducer 130.Described volume and described rail pressure are for determining the fuel quantity that is stored in common fuel track 114.
The rail pressure of the serviceability of a plurality of fuel injectors 118 fuel in fuel value, described common fuel track, engine speed and the wherein total number of effective cylinder of burner oil are indicated, and described fuel value is the fuel quantity being sprayed by each fuel injection stroke.
For the function of predicting the described IMV electric current during power operation, from operating parameter as described in the component operating of CRS as described in impact as shown in flow equilibrium Figure 200, derive.For predicting that based on flow equilibrium Figure 200 an example of the described function of IMV electric current is:
IMV electric current=f{A+ (B*EFP)+(C*FV*RPM*EFP* (ACTIVE/TOTAL)) }
Wherein A, B and C are can be according to the variable of the configuration calibration of described CRS;
Wherein EFP is the motor fuel pressure of the fuel that provided by described low-pressure fuel pump in described IMV inlet;
Wherein FV is the fuel value (also referred to as fuel charge (fuel charge)) of the fuel quantity that sprayed by single sparger stroke;
Wherein RPM is the engine speed representing with rpm;
Wherein " ACTIVE " is wherein by the number of the cylinder of fuel injector burner oil;
Wherein " TOTAL " is the total number of cylinder in motor;
Function above produces the mapping between total fuel quantity and IMV position, wherein more fuel corresponding to reduced-current (valve of more opening) and less fuel corresponding to high current (valve of more closing).
In some embodiments, described FV item can be substituted by gross horse power (GHP) or by another of FV majorant.As an example, for predicting IMV electric current and receiving a mandate during power operation, with the function that IMV electric current sent to described IMV, generate by returning.Described recurrence is used from approximate 5000 random numbers strong points of various CRS unit and is set up and verify for 30000 data points from those CRS unit.
Fig. 3 illustrates when being applied to File for predicting the regression curve of described IMV electric current.Should be understood that, described plotted curve is nonrestrictive and is only provided as example, and other data points are possible.Described plotted curve contrasts actual IMV electric current (x axle) and the prediction IMV electric current (y axle) being produced by above-mentioned function.In plotted curve, shown in broken lines with respect to ideal regression line or desirable error line 300(from the data point of described File) and show, described in the desirable tropic or desirable error line 300, predicting actual IMV electric current described in IMV currents match.In addition, error threshold line 302(is shown as dot and dash line) be positioned at above described desirable error line.The data point of error threshold line 302 belows represents to be considered to be in the fuel flow rate in the acceptable operating state of CRS100.In other words, the fuel flow rate that enters described CRS and the fuel flow rate that leaves described CRS be balance haply.On the other hand, if actual IMV electric current significantly makes described data point (as situation of data point 304) above error threshold line 302 lower than prediction IMV electric current, can suppose so the fuel existing with respect to from described system output, have excess of fuel flowing into the situation of described system.This situation is indicated fuel leakage or the another kind of degradation of described CRS.
In some embodiments, in the scope of described IMV electric current, described error threshold is with respect to (in scale) variation in proportion of described desirable error.In some embodiments, in the scope of IMV electric current, along with described IMV electric current increases, described error threshold increases with respect to described desirable error.In some embodiments, described error threshold is non-linear zoom with respect to described desirable error.In some embodiments, in the zones of different of described IMV electric current, described error threshold is different with respect to the variation of described ideal I MV error.
Fig. 4 is illustrated in error threshold described in the zones of different of IMV electric current how with respect to an example of described desirable error change.In prediction IMV electric current is lower first area 402, described error threshold is set as the first value.At prediction IMV electric current, be greater than in the second area 406 of described prediction IMV electric current of first area 402, described error threshold is set as being greater than the second value of described the first value.Second area 406 is upper areas of the prediction IMV electric current during power operation.In the 3rd region 404 between first area 402 and second area 406, described error threshold is the ramp function between described the first value and described the second value.In other words, in the 3rd region 404, described error threshold is increased to described the second value with constant ramp value from described the first value.The shape of error threshold 302 is through limiting the larger variance of holding the data point of described recurrence to increase along with described IMV electric current.By the region based on prediction IMV electric current, come to change error threshold with respect to desirable error, reduced because the false positive of fuel leakage (having another name called harmful fault (nuisance fault)) is measured the engine cutoff causing.Therefore, more often not there is not the interruption of power operation.Be understandable that, in the situation that not departing from the utility model scope, the shape of described error threshold can be changed into almost any desired configuration, to hold the variance of the data point of described recurrence.
Fig. 5 is for controlling embodiment's the flow chart of the fuel leakage detecting method 500 of common rail fuel system.In an example, method 500 can be carried out by the controller 106 shown in Fig. 1.Specifically, controller 106 repeats method 500 and monitors the thick fuel leakage in CRS100 in whole power operation.At 502 places, method 500 comprises determines whether engine speed is greater than rotary speed threshold value.Described determining step checks that whether described motor operates under suitable engine speed to operate described engine-driven petrolift, makes fuel flow spray by IMV112 and by a plurality of fuel injectors 118.Described rotary speed threshold value can be set in almost any suitable speed.In an example, rotary speed threshold value is set as 330RPM.Can continue predetermined lasting time and carry out described determining step.In an example, described predetermined lasting time is 5 seconds.If determine that engine speed is greater than rotary speed threshold value, method 500 moves to 504.Otherwise described method turns back to 502.
At 504 places, method 500 comprises determines prediction inlet metering valve position.In some embodiments, described prediction IMV position is based on prediction IMV electric current.In an example, described prediction inlet metering valve electric current is the fuel pressure of described inlet metering valve inlet, the fuel quantity being sprayed by the single-fuel sparger stroke that is connected to the fuel injector of described common fuel track, engine speed and the effective function of cylinder number.In another example, described prediction inlet metering valve electric current is for example the fuel pressure of described inlet metering valve inlet,, the horsepower (gross horse power or net horsepower) of described motor, engine speed and the effectively function of cylinder number.In described example function, any one can generate from the recurrence of the IMV electric current of the data point of CRS100 operation from generation.Additionally or alternatively, can predict by the flow velocity of the fuel of described IMV.
At 506 places, method 500 comprises determines actual inlet metering valve position.In some embodiments, described actual IMV position is based on actual IMV electric current.In an example, controller 106 provides described actual IMV electric current by guide line to IMV112.Additionally or alternatively, can measure, determine or derive the fuel flow rate by described IMV from other operating parameters.
At 508 places, method 500 comprises the error of determining between prediction inlet metering valve position (or IMV electric current) and actual inlet metering valve position (or IMV electric current).In an example, by the difference of getting between actual IMV electric current and prediction IMV electric current, determine described error.In some embodiments, within one period of endurance, obtain the sample of actual IMV electric current and prediction IMV electric current, and the mean value of described difference is filtered to determine described error.Additionally or alternatively, can determine the predicted velocity of the fuel by described IMV and the error between actual flow velocity.
At 510 places, method 500 comprises determines whether described error is greater than error threshold.If error is greater than error threshold, method 500 moves to 512.Otherwise described IMV electric current is in suitable operating range and flow into and the fuel flow rate that flows out described CRS is suitable, and method 500 turns back to other operations.
At 512 places, method 500 comprises that in response to described error, being greater than described error threshold sets degraded conditions.Described error threshold can be set as any suitable value.In some embodiments, described error threshold can be set as compared with peanut or be approximately zero.In this class mode of execution, described method will comprise in response to described error sets described degraded conditions.In some embodiments, setting described degraded conditions comprises and closes described motor (for example automatically).In some embodiments, set described degraded conditions and comprise the indication that fuel leakage is provided to operator.As an example, in response to the described degraded conditions of setting, open fuel leakage tutorial light.
By predict the operation of described common rail fuel system with described inlet metering valve electric current, only use model engine operating parameter fuel leakage just to be detected, and sensor that need not be special or additionally input.This method can reduce cost of production and the design complexity of described common rail fuel system.In other words, this method provides " Noninvasive " CRS Leak testtion, and this detection can carry out continuously protecting described motor in whole operating process.
Fig. 6 is for controlling the embodiment's who safeguards diagnostic method 600 of common rail fuel system flow chart.In an example, method 600 can be carried out by the controller 106 shown in Fig. 1.At 602 places, method 600 comprises determines the current no-load condition that whether has described motor.The no-load condition of motor comes across when described motor rotates by inertia or from the external torque of described external engine generation.As an example, during engine start when actuating motor rotates described motor, there is no-load condition.Described in the engine-driving of rotating, petrolift pressurizes to described common fuel track.As another example, when motor/generator provides power for described motor, there is no-load condition.As another example, when described motor absorbs torque or produce negative or retarding torque, as during coasting events, there is no-load condition.In other words, the no-load condition of motor is to there is no need to carry out the state that fuel sprays to meet engine loading.If there is no-load condition, method 600 moves to 604.Otherwise method 600 turns back to 602.
At 604 places, method 600 comprises determines whether fuel rail pressure is greater than rail pressure threshold value.Described determining step checks whether described fuel rail pressure has run up to enough operant levels.Described rail pressure threshold value can be set as any suitable stress level.In an example, rail pressure Threshold is 40000kPa.If fuel rail pressure is greater than rail pressure threshold value, method 600 turns back to other operations.Otherwise method 600 moves to 606.
At 606 places, method 600 comprises determining whether described fuel rail pressure becomes lasting the second appointment endurance and be greater than described rail pressure threshold value, and motor fuel pressure is greater than in engine pressure threshold value and the engine speed range of engine speed in appointment.The pressure of the fuel that described motor fuel pressure representative is provided by described low-pressure fuel pump in described IMV inlet.The definite of described engine speed range checks whether described motor in fact starts to drive described low-pressure fuel pump.Described motor fuel pressure definite whether check in fact to described IMV fuel is provided in case in described common fuel track accumulated pressure.If motor starts and motor fuel pressure is less than engine pressure threshold value, can suppose for operating motor fuel pressure Shortcomings and the low-pressure fuel pump of described motor and may maybe may not have in normal work.Therefore, method 600 moves to 618.If described motor starts and described motor fuel pressure just surpasses described threshold value in accumulated pressure, method 600 moves to 608.
At 608 places, method 600 comprises determines whether described fuel rail pressure is greater than described rail pressure threshold value.For example, if described motor (starts, engine speed is in speed range) and described low-pressure fuel pump is just in pump fuel (for example, motor fuel pressure > engine pressure threshold value), but described fuel rail (is not for example pressurizeed, described fuel rail pressure < rail pressure threshold value), can suppose in described high-pressure fuel system and to have the degradation that leaks or have another kind of type, and method 600 moves to 618.Otherwise if described motor starts, described low-pressure fuel pump is operating and described fuel rail accumulation of pressure carrys out test fuel decline of pressure to enough stress levels, method 600 moves to 610.
Described second specifies endurance, described motor fuel pressure threshold and described engine speed range can be set as any suitable value.In an example, second to specify the endurance be 30 seconds, and track fuel pressure threshold is 40000kPa, and motor fuel pressure threshold is approximately 241kPa and given engine speed scope between 35RPM and 325RPM.If described fuel rail pressure keeps being greater than described rail pressure threshold value during these serviceability, method 600 moves to 610 so.Otherwise, can suppose, there is degradation in described CRS, as thick fuel leakage, because fuel rail pressure cannot remain on described rail pressure threshold value.If fuel pressure becomes, in the lasting selected endurance, be less than track fuel pressure threshold, method moves to 618 so.
At 610 places, method 600 comprises that the fuel that stops described a plurality of fuel injectors sprays.In an example, stopping fuel spraying and to comprise that control impuls bandwidth modulation signals carrys out described in order not burner oil of a plurality of fuel injectors.In some embodiments, stopping fuel spraying and to comprise and close the petrolift that fuel is provided to described inlet metering valve import.In addition, can stop in any suitable manner fuel and spray, comprise and stop fuel to enter to the high pressure fuel pump of described fuel rail feed fuels, as by closing other stop valve or analog.
At 612 places, method 600 comprises closes described IMV.In an example, close described IMV and comprise that order is increased to the electric current corresponding to complete closed position for controlling the IMV electric current of described IMV position.
At 614 places, method 600 is included in to be initiated, for before measuring the predetermined lasting time of fuel pressure rate of decay of described common fuel track, to verify closing of described IMV.In an example, verify that closing of described IMV comprises that in response to described IMV electric current is greater than current threshold, starting described first specifies the endurance.Described current threshold is set as the electric current corresponding to the described complete closed position of described IMV.In an example, described current threshold is set as 1.8Amps.By verifying closing of described IMV, can increase described fuel pressure rate of decay and really fix exactness.
At 616 places, method 600 comprises determines after the first appointment endurance in described common fuel track whether the fuel rail decline of pressure speed of fuel pressure is greater than decay threshold value.Described decline of pressure speed and described first specifies the endurance can be set as any suitable value.In an example, decay threshold value is that 500kPa and the first appointment endurance are 0.2 second.If fuel rail decline of pressure speed is greater than decay threshold value, method 600 moves to 618.Otherwise, just determine and do not exist fuel leakage and method 600 to turn back to other operations.
At 618 places, method 600 comprises setting degraded conditions.In some cases, in response to the fuel rail decline of pressure speed of fuel pressure in described common fuel track after described first specifies the endurance, be greater than degraded conditions described in described decay Threshold.In this class situation, there is fuel leakage in described degraded conditions indication in the high-pressure area between described IMV and described fuel injector of described CRS.In some cases, in response to described fuel pressure, continue described second and specify the endurance to be less than described fuel rail pressure threshold to set described degraded conditions, wherein said motor fuel pressure is greater than described motor fuel pressure threshold and described engine speed within the scope of given engine speed.In this class situation, described degraded conditions shows to exist thick fuel leakage or parts to demote in described CRS, because fuel pressure cannot accumulate in described common fuel track, even if described low-pressure fuel pump is just in pump fuel.
In some embodiments, setting described degraded conditions comprises and closes described motor.In some embodiments, set described degraded conditions and comprise the indication that fuel leakage is provided to operator.As an example, in response to having set described degraded conditions, open fuel leakage tutorial light.
Said method makes it possible to the fuel leakage in CRS described in high resolution detection.More particularly, by monitoring the fuel pressure rate of decay in described common fuel track, all parts and the relatively little leakage being connected in described CRS (or very slowly water clock) can be detected.In addition,, by carry out described method during no-load condition, Leak testtion can be carried out in the situation that not interrupting power operation.Therefore, can suppress the reduction of maneuverability or operability.More particularly, when carrying out described method during startup event, in those time periods when described CRS most possibly fuel leakage occurs due to inappropriate maintenance, carry out Leak testtion.Therefore, can before becoming larger or described CRS is caused to larger degradation, fuel leakage detect early them.
In addition, described method makes it possible to detect the fuel leakage in double wall system, and liquid sensor can not.For example, described method detects and betides the fuel leakage that whole injector nozzle, sparger control path etc. are located.In addition, described method does not need additional sensors or I/O combination.Described method goes for comprising the engine configurations of a large amount of fuel injectors, and wherein fuel injection event occurs more frequently, and the time period between fuel injection event is too short to such an extent as to can not monitor fuel pressure rate of decay for fuel leakage.
Another embodiment relates to the fuel system for motor.Described system comprises petrolift and valve, and described valve can be used to controls the fuel flow rate that flows to described petrolift.Described fuel system also comprises common fuel track, and described common fuel track is connected to a plurality of fuel injectors by described petrolift fluid, and described a plurality of fuel injectors can be used to the cylinder that injects fuel into described motor.Described fuel system also comprises controller, and described controller can be used to the information of the prediction valve position that receives described valve and/or calculates described prediction valve position.Described controller further can be used to the information of the actual valve position that receives described valve and/or determines described actual valve position.Described controller further can be used to the error of calculating between described prediction valve position and described actual valve position, and for generating the one or more signals relevant with setting degraded conditions in response to described error.
Another embodiment relates to fuel delivery system.Described system comprises: petrolift, valve and common fuel track, described valve can be used to controls the fuel flow rate that flows to described petrolift, described common fuel track is connected to a plurality of fuel injectors by described petrolift fluid, and described a plurality of fuel injectors can be used to the cylinder that injects fuel into motor.Described system further comprises controller.During the no-load condition of described motor, described controller can be used to: the fuel that stops described a plurality of fuel injector (for example, all spargers of described motor) sprays; Close described valve; And in response to one period of endurance (for example, selected or otherwise the endurance of appointment) afterwards in described common fuel track the rate of decay of fuel pressure be greater than decay Threshold degraded conditions.Such system can be implemented in having the motor environment of single high pressure fuel pump.
The utility model has used various examples to disclose the utility model, comprises optimal mode, also makes those skilled in the relevant art can put into practice the utility model simultaneously, comprises any method of manufacturing and using any device or system and enforcement to contain.Scope that can granted patent of the present utility model is defined by the claims, and can comprise other examples that those skilled in the art expects.If the structural element of other these type of examples is identical with the letter of claims, if or the letter of the equivalent structure key element that comprises of this type of example and claims without essential difference, this type of example also belongs to the scope of claims.
Should be understood that above description be intended to explanation but not limit.For example, above-described embodiment (and/or its aspect) use that can be bonded to each other.In addition, can in the situation that not departing from the utility model scope, make many modifications, so that special circumstances or material are applicable to religious doctrine of the present utility model.Although the size of material described in the utility model and type are intended to for defining parameter of the present utility model, they limit never in any form, and are only exemplary embodiment.In appended claims, term " comprises " and " therein " " comprises " and the concise expression equivalent of " wherein " as corresponding term.In addition,, in following claims, term " first ", " second " and " the 3rd " etc. are only used as label, and its object are not forced to numeral or spatial requirement.
Read by reference to the accompanying drawings, by the description above of understanding better some embodiment of the present utility model.Although accompanying drawing illustrates the diagram of various embodiments' function block, the division between the not certain indication hardware circuit of described function block.Therefore, for example, for example, one or more can for example, enforcement in single hardware (, general purpose signal processor, microcontroller, random access memory, hard disk etc.) in described function block (, processor or storage).Similarly, described program can be stand-alone program, can be incorporated to as the subroutine in operation system, can be function in mounting software bag etc.Described various embodiment is not limited to the layout shown in accompanying drawing and means.
Should be appreciated that, in the utility model, element or the step of with singulative, enumerating and drawing by words " " or " one " are not got rid of a plurality of described elements or step, unless explicitly stated otherwise this type of eliminating situation.In addition, the reference of the utility model " embodiment " is not intended to be interpreted as getting rid of other embodiments that existence comprises described feature equally.In addition, situation is contrary unless explicitly stated otherwise, otherwise " comprising ", " comprising " or " having " has certain element of special properties or the embodiment of a plurality of elements can comprise other these class components without described character.
Claims (12)
1. a system, it comprises:
Low-pressure fuel pump, it can be used under the first pressure from fuel source pump fuel;
High pressure fuel pump, it can be used to described the first pressure is increased to the second pressure;
Valve, it is arranged between described low-pressure fuel pump and described high pressure fuel pump, and described valve can be used to controls the fuel flow rate that flows to described high pressure fuel pump;
Common fuel track, it is connected to a plurality of fuel injectors by described high pressure fuel pump fluid, and described a plurality of fuel injectors can be used to the cylinder that injects fuel into motor; And
Controller, its can be used to determine described valve prediction valve position, determine described valve actual valve position, calculate error between described prediction valve position and described actual valve position and in response to described error setting degraded conditions.
2. the system as claimed in claim 1, wherein said controller can be used in response to the described degraded conditions of setting and closes described motor.
3. the system as claimed in claim 1, the fuel quantity that inlet's fuel pressure that wherein said prediction valve position is described valve, the single-fuel sparger stroke of in described a plurality of fuel injectors spray, engine speed and the effectively function of cylinder number.
4. the system as claimed in claim 1, wherein said degraded conditions is in response to described error and is greater than error threshold and sets.
5. system as claimed in claim 4, it is foundation that wherein said prediction valve position be take pre-side valve electric current, and actual valve electric current be take as foundation in described actual valve position.
6. system as claimed in claim 5, wherein for the first area of described pre-side valve electric current, described error threshold is the first value, for described pre-side valve electric current, be greater than the second area of the described pre-side valve electric current of described first area, described error threshold is the second value that is greater than described the first value, and for the 3rd region between described first area and described second area of described pre-side valve electric current, described error threshold is the ramp function between described the first value and described the second value.
7. a system, it comprises:
Low-pressure fuel pump, it can be used under the first pressure from fuel source pump fuel;
High pressure fuel pump, it can be used to described the first pressure is increased to the second pressure;
Valve, it is arranged between described low-pressure fuel pump and described high pressure fuel pump, and described valve can be used to controls the fuel flow rate that flows to described high pressure fuel pump;
Common fuel track, it is connected to a plurality of fuel injectors by described high pressure fuel pump fluid, and described a plurality of fuel injectors can be used to the cylinder that injects fuel into motor; And
Controller, it can be used to: determine the pre-side valve electric current of described valve, described pre-side valve electric current is the fuel pressure of described valve inlet, fuel quantity that the single-fuel sparger stroke of in described a plurality of fuel injectors sprays, engine speed and the effective function of cylinder number; Determine the actual valve electric current of described valve; Determine the error between described pre-side valve electric current and described actual valve electric current; And in response to being greater than error threshold values, described error closes described motor.
8. system as claimed in claim 7, wherein, in the scope of described pre-side valve electric current, described error threshold changes in proportion with respect to desirable error.
9. system as claimed in claim 8, wherein, along with described pre-side valve electric current increases, described error threshold increases with respect to described desirable error.
10. system as claimed in claim 9, wherein said error threshold is non-linear zoom with respect to described desirable error.
11. systems as claimed in claim 7, wherein for the first area of described pre-side valve electric current, described error threshold is the first value, for described pre-side valve electric current, be greater than the second area of the described pre-side valve electric current of described first area, described error threshold is the second value that is greater than described the first value, and for the 3rd region between described first area and described second area of described pre-side valve electric current, described error threshold is the ramp function between described the first value and described the second value.
12. systems as claimed in claim 7, wherein said common fuel track is single wall common fuel track.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US13/177,139 US8857412B2 (en) | 2011-07-06 | 2011-07-06 | Methods and systems for common rail fuel system dynamic health assessment |
| US13/177139 | 2011-07-06 | ||
| PCT/US2012/040648 WO2013006238A2 (en) | 2011-07-06 | 2012-06-04 | Methods and systems for common rail fuel system dynamic health assessment |
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|---|---|
| CN203783739U true CN203783739U (en) | 2014-08-20 |
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| CN201290000647.9U Expired - Lifetime CN203783739U (en) | 2011-07-06 | 2012-06-04 | System for evaluating dynamic state of common rail fuel system |
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| Country | Link |
|---|---|
| US (1) | US8857412B2 (en) |
| CN (1) | CN203783739U (en) |
| AU (1) | AU2012279441B2 (en) |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105067255A (en) * | 2015-09-16 | 2015-11-18 | 北京亚新科天纬油泵油嘴股份有限公司 | Special endurance test bench for fuel metering valve |
| CN106502263A (en) * | 2015-09-03 | 2017-03-15 | 通用电气公司 | Flight path optimization using Non-Linear Programming |
| CN109154247A (en) * | 2016-05-24 | 2019-01-04 | 德尔福知识产权有限公司 | Method of the control for the test equipment of fuel injection |
| CN112819991A (en) * | 2021-01-11 | 2021-05-18 | 浙江吉利控股集团有限公司 | Fault processing method for dual-fuel automobile, terminal and storage medium |
Families Citing this family (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1398227B1 (en) * | 2009-06-09 | 2013-02-22 | Magneti Marelli Spa | METHOD FOR CARS LEARNING THE VARIATION OF A NOMINAL OPERATING CHARACTERISTIC OF A HIGH-PRESSURE PUMP WITH A VARIABLE FLOW IN AN INTERNAL COMBUSTION ENGINE |
| US9512799B2 (en) * | 2011-07-06 | 2016-12-06 | General Electric Company | Methods and systems for common rail fuel system maintenance health diagnostic |
| DE102012203097B3 (en) * | 2012-02-29 | 2013-04-11 | Continental Automotive Gmbh | Method for determining error of pressure measured by pressure sensor in pressure accumulator for storing fluid in automobile, involves determining two three-tuples of pressures and of time period |
| JP2014066136A (en) * | 2012-09-24 | 2014-04-17 | Mazda Motor Corp | Control device for engine |
| US9903306B2 (en) | 2013-02-08 | 2018-02-27 | Cummins Inc. | System and method for acquiring pressure data from a fuel accumulator of an internal combustion engine |
| US9551631B2 (en) | 2013-02-08 | 2017-01-24 | Cummins Inc. | System and method for adapting to a variable fuel delivery cutout delay in a fuel system of an internal combustion engine |
| US9267460B2 (en) | 2013-07-19 | 2016-02-23 | Cummins Inc. | System and method for estimating high-pressure fuel leakage in a common rail fuel system |
| US9593637B2 (en) * | 2013-12-05 | 2017-03-14 | Ford Global Technologies, Llc | Method of diagnosing injector variability in a multiple injector system |
| KR101500406B1 (en) * | 2013-12-31 | 2015-03-18 | 현대자동차 주식회사 | Injector Correcting Apparatus for Hybrid Electric Vehicle and Method Thereof |
| US9334824B2 (en) * | 2014-02-27 | 2016-05-10 | Ford Global Technologies, Llc | Method and system for characterizing a port fuel injector |
| US9828930B2 (en) | 2014-09-19 | 2017-11-28 | General Electric Company | Method and systems for diagnosing an inlet metering valve |
| SE540092C2 (en) | 2016-07-12 | 2018-03-20 | Scania Cv Ab | Method and system for diagnosing unintended fuelling from fuel injectors of an engine |
| US10260446B2 (en) * | 2016-07-21 | 2019-04-16 | Ge Global Sourcing Llc | Methods and system for aging compensation of a fuel system |
| US10041432B2 (en) * | 2017-01-09 | 2018-08-07 | Caterpillar Inc. | Fuel system having pump prognostic functionality |
| US11668262B2 (en) | 2017-01-30 | 2023-06-06 | Transportation Ip Holdings, Llc | Methods and system for diagnosing a high-pressure fuel pump in a fuel system |
| US10526994B2 (en) | 2017-01-30 | 2020-01-07 | Transportation Ip Holdings, Llc | Methods and system for diagnosing a high-pressure fuel pump in a fuel system |
| US20190040812A1 (en) * | 2017-08-04 | 2019-02-07 | GM Global Technology Operations LLC | Method of diagnosing a high pressure fuel delivery system |
| DE102017222559B4 (en) * | 2017-12-13 | 2021-03-11 | Vitesco Technologies GmbH | Method and device for predicting the point in time of failure of the pressure relief valve of a high-pressure fuel pump of a motor vehicle |
| WO2019132867A1 (en) | 2017-12-27 | 2019-07-04 | Cummins Inc. | System and method for identifying a source of high pressure leakage |
| JP7074003B2 (en) * | 2018-09-25 | 2022-05-24 | 株式会社デンソー | Fuel pump controller |
| DE102019211372A1 (en) * | 2019-07-30 | 2021-02-04 | Mtu Friedrichshafen Gmbh | Method for monitoring a fuel supply system of an internal combustion engine and internal combustion engine for carrying out such a method |
| CN113405746A (en) * | 2021-06-30 | 2021-09-17 | 东风商用车有限公司 | Leakage fault diagnosis method and device for oil rail pressure release valve |
Family Cites Families (31)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4105705A1 (en) * | 1991-02-21 | 1992-09-03 | Mannesmann Ag | VALVE DEVICE |
| US5685268A (en) | 1996-05-20 | 1997-11-11 | Siemens Automotive Corporation | Fuel leakage detector system |
| DE59801054D1 (en) * | 1997-09-29 | 2001-08-23 | Siemens Ag | METHOD FOR MONITORING AN INJECTION SYSTEM |
| DE19802583C2 (en) | 1998-01-23 | 2002-01-31 | Siemens Ag | Device and method for regulating pressure in accumulator injection systems with an electromagnetically actuated pressure actuator |
| US6557530B1 (en) | 2000-05-04 | 2003-05-06 | Cummins, Inc. | Fuel control system including adaptive injected fuel quantity estimation |
| DE10141821C1 (en) * | 2001-08-27 | 2003-04-24 | Bosch Gmbh Robert | Method, computer program and control and / or regulating device for operating an internal combustion engine |
| DE10144800A1 (en) * | 2001-09-12 | 2003-04-03 | Bosch Gmbh Robert | Method, computer program, control and / or regulating device for operating an internal combustion engine, and fuel system for an internal combustion engine |
| US6691677B2 (en) | 2002-02-15 | 2004-02-17 | Cummins Inc. | Fuel delivery device and fuel delivery system |
| JP4045594B2 (en) * | 2003-04-08 | 2008-02-13 | 株式会社デンソー | Accumulated fuel injection system |
| DE10329331B3 (en) * | 2003-06-30 | 2005-05-25 | Siemens Ag | Method for diagnosing a volume flow control valve in an internal combustion engine with high-pressure accumulator injection system |
| US7111605B2 (en) | 2003-07-11 | 2006-09-26 | Cummins, Inc. | System for modifying fuel pressure in a high-pressure fuel injection system for fuel system leakage testing |
| US7337652B2 (en) | 2003-10-22 | 2008-03-04 | Caterpillar Inc. | Fuel system with leak location diagnostic features and component for same |
| KR20060125839A (en) | 2004-01-14 | 2006-12-06 | 로베르트 보쉬 게엠베하 | Method and control device for operating an internal combustion engine with an injection system |
| DE102004045738B4 (en) * | 2004-09-21 | 2013-05-29 | Continental Automotive Gmbh | Method and device for controlling an internal combustion engine |
| WO2006052657A2 (en) * | 2004-11-03 | 2006-05-18 | Activeshock, Inc. | Electrically controlled pressure relief valve |
| DE102004061474B4 (en) | 2004-12-21 | 2014-07-17 | Mtu Friedrichshafen Gmbh | Method and device for controlling the rail pressure |
| JP4453623B2 (en) * | 2005-07-19 | 2010-04-21 | 株式会社デンソー | Fuel injection device and abnormality detection method for fuel injection device |
| JP4050287B2 (en) * | 2005-08-10 | 2008-02-20 | 三菱電機株式会社 | Energy-saving high-pressure fuel supply control system for internal combustion engines |
| JP4475205B2 (en) * | 2005-09-01 | 2010-06-09 | 株式会社デンソー | Control device for common rail fuel injection system |
| US7195001B1 (en) | 2005-09-02 | 2007-03-27 | Ford Global Technologies, Llc | Fuel injector activity verification |
| JP4000159B2 (en) * | 2005-10-07 | 2007-10-31 | 三菱電機株式会社 | High pressure fuel pump control device for engine |
| DE102005048346A1 (en) * | 2005-10-10 | 2007-04-12 | Robert Bosch Gmbh | Method for operating an internal combustion engine with an electro-hydraulic valve control |
| US7392790B2 (en) * | 2006-01-20 | 2008-07-01 | Caterpillar Inc. | System and method for resolving crossed electrical leads |
| US7370635B2 (en) * | 2006-01-20 | 2008-05-13 | Caterpillar Inc. | System and method for resolving electrical leads |
| JP4659648B2 (en) * | 2006-03-08 | 2011-03-30 | 本田技研工業株式会社 | Abnormality judgment device for fuel supply system |
| DE102007003150B4 (en) * | 2007-01-22 | 2008-12-11 | Continental Automotive Gmbh | Method for determining an uncontrolled speed increase of an internal combustion engine |
| JP4355346B2 (en) * | 2007-05-21 | 2009-10-28 | 三菱電機株式会社 | Control device for internal combustion engine |
| DE102007027943B3 (en) * | 2007-06-18 | 2008-10-16 | Mtu Friedrichshafen Gmbh | Method for regulating the rail pressure during a start-up procedure |
| US20080319630A1 (en) * | 2007-06-22 | 2008-12-25 | Esau Aguinaga | Adaptive air intake manifold valve actuator (IMVA) |
| EP2280161A4 (en) * | 2008-04-10 | 2013-07-10 | Bosch Corp | Injection abnormality detection system and common-rail fuel injection controller |
| DE102008054513A1 (en) * | 2008-12-11 | 2010-06-17 | Robert Bosch Gmbh | Method for operating a fuel injection system of an internal combustion engine |
-
2011
- 2011-07-06 US US13/177,139 patent/US8857412B2/en not_active Expired - Fee Related
-
2012
- 2012-06-04 WO PCT/US2012/040648 patent/WO2013006238A2/en active Application Filing
- 2012-06-04 AU AU2012279441A patent/AU2012279441B2/en not_active Ceased
- 2012-06-04 CN CN201290000647.9U patent/CN203783739U/en not_active Expired - Lifetime
- 2012-06-04 DE DE112012002837.6T patent/DE112012002837T5/en not_active Withdrawn
Cited By (7)
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| CN109154247A (en) * | 2016-05-24 | 2019-01-04 | 德尔福知识产权有限公司 | Method of the control for the test equipment of fuel injection |
| CN109154247B (en) * | 2016-05-24 | 2021-11-23 | 德尔福知识产权有限公司 | Method for testing components of a fuel injection system |
| CN112819991A (en) * | 2021-01-11 | 2021-05-18 | 浙江吉利控股集团有限公司 | Fault processing method for dual-fuel automobile, terminal and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2012279441A1 (en) | 2014-01-23 |
| AU2012279441B2 (en) | 2016-09-08 |
| DE112012002837T5 (en) | 2014-04-30 |
| US8857412B2 (en) | 2014-10-14 |
| WO2013006238A2 (en) | 2013-01-10 |
| US20130013175A1 (en) | 2013-01-10 |
| WO2013006238A3 (en) | 2013-04-25 |
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